A Teledyne Benthos Positioning Datasheet Teledyne Benthos Directional Acoustic Transponder (DAT) All-In-One: Range, Bearing, and Data Communication The Benthos DAT (Directional Acoustic Transponder) is an extension to the Teledyne Benthos ATM-900 Series modem which automatically estimates the azimuthal and vertical arrival angles of a message sent by a remote modem. The system is a “modified” ultra-short baseline (USBL) which uses a broadband component of a typical modem message to form estimates of arrival angle(s). While conventional USBL devices employ tonal signals, the appropriate processing of wide band signals provides far better combined range and arrival angle estimation, especially at low Signal to Noise Ratio (SNR). The device offers a clear 360 degree field of view in azimuth, and an approximate vertical coverage spanning + 90º overhead to -50º below horizontal. The DAT’s compact size and low power consumption make it appropriate for both surface and subsurface platforms. Acoustic modem and USBL functionality can now be integrated on Autonomous Underwater Vehicles in one system. Mounting the DAT on an AUV, as an inverted USBL system, can provide navigational accuracy unsurpassed by other systems. PRODUCT FEATURES Cleared for public release by Teledyne Benthos, a business unit of Teledyne Instruments, Inc. 02/17/12 (FAL1206) • coustic Modem and USBL Functionality in One Package A • ultiple frequency options (LF, MF, and Band-C) M • ompact Form Factor C • vailable either in a pressure housing or as an OEM board set A with matching transducer • ower Power Consumption L A Teledyne Marine Systems Company

A Teledyne Benthos Positioning Datasheet Directional Acoustic Transponder (DAT) TECHNICAL SPECIFICATIONS Acoustic Modem Data Rate: Data Storage: Processing: Data redundancy, 1/2 rate convolutional coding multipath guard period selection MFSK and PSK modulation schemes Distances/Range: - 6 km common, greater distances possible 2 km available using repeater functionality 20+ Frequencies: frequency (LF) 9-14 kHz Low M id frequency (MF) 16-21 kHz Band C (C) 22 – 27 kHz Transducer: Transmit omni-directional (Toroidal pattern) Remote transducer head options available. Call for details. Connection:...